通過排氣凸輪軸上的電子氣門升程切換系統以及進氣和排氣凸輪軸上的可變氣門正時,實現對每個氣缸氣體交換的優化控制。較小的凸輪輪廓僅用于低轉速,此功能有以下好處:
① 優化氣體交換;
② 防止廢氣回流到之前的180°排氣缸;
③ 入口打開時間更早,填充程度更佳;
④ 通過燃燒室內的正壓差減少余氣;
⑤ 提升響應性;
⑥ 在較低轉速和較高增壓壓力下達到更高的轉矩。
Through the electronic valve lift switching system on the exhaust camshaft and the variable valve timing on the intake and exhaust camshafts, the optimal control of gas exchange of each cylinder is realized. The smaller cam profile is only used for low speeds, and this feature has the following benefits:
① Optimize gas exchange;
② Prevent the exhaust gas from flowing back to the previous 180 ° exhaust cylinder;
③ The inlet opening time is earlier and the filling degree is better;
④ The residual gas is reduced by the positive pressure difference in the combustion chamber;
⑤ Improve responsiveness;
⑥ Higher torque at lower speed and higher boost pressure.
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